Terms and definitions from all courses

Debugging: Troubleshooting, or searching for errors in a script or program


Decision node: A node of the tree where decisions are made Decision tree: A flowchart-like structure that uses branching paths to predict the outcomes of events, or the probability of certain outcomes


Deduplication: The elimination or removal of matching data values in a dataset def: A keyword that defines a function at the start of the function block


Dependent events: The concept that two events are dependent if one event changes the probability of the other event


Dependent variable (Y): The variable a given model estimates Describe(): A function that returns the statistical summary of a dataframe or series, including mean, standard deviation, and minimum and maximum column values. Descriptive statistics: A type of statistics that summarizes the main features of a dataset dict(): A function used to create a dictionary


Dictionary: A data structure that consists of a collection of key-value pairs


difference(): A function that finds the elements present in one set but not the other


Dimensions: Qualitative data values used to categorize and group data to reveal details about it


Discovering: The process data professionals use to familiarize themselves with the data so they can start conceptualizing how to use it; one of the six practices of EDA Discrete features: Features with a countable number of values between any two values Discrete random variable: A variable that has a countable number of possible values Discrete: A mathematical concept indicating that a measure or dimension has a finite and countable number of outcomes


distance_threshold: A hyperparameter in agglomerative clustering models that determines the distance above which clusters will not be merged
Documentation: An in-depth guide that is written by the developers who created a package that features very specific information on various functions and features Documentation string: A group of text that explains what a method or function does; also referred to as a “docstring”